"October 4, 2017 at the cosmodrome Vostochniy launched a comprehensive test launch complex. Launch vehicle (LV) "Soyuz-2.1a" together with the upper stage (RB) "Fregat" was taken from the technical to the launching complex and installed in the launching system. A mobile service tower was launched on the launching system and general tests of the space rocket "Fregat" systems."(translated with Google translator)